benchmarks/gem_latency: Fix compiler warning

Fix compiler warning about I915_EXEC_FENCE_OUT definition/redefinition
as it is defined in libdrm/i915_drm.h:890:0

gem_latency.c:48:0: warning: "I915_EXEC_FENCE_OUT" redefined
 #define I915_EXEC_FENCE_OUT (1 << 17)
  ^
In file included from ../lib/intel_batchbuffer.h:6:0,
                 from ../lib/drmtest.h:39,
                 from ../lib/igt.h:27,
                 from gem_latency.c:31:

Signed-off-by: Mika Kahola <mika.kahola@intel.com>
1 file changed